Author Topic: Water Pump surging  (Read 622 times)

Mike Shumack

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Water Pump surging
« on: January 13, 2020, 04:18:05 PM »
When I turn on my water pump (Shurflow 2088) while not connected to city water, the pump dose not surge with all faucets closed - I don't have any external leaks.

But when I run the water (shower or faucets) the pump surges about every second or two seconds. The water comes out in surges rather than a steady flow. I'm expecting the pump to run steady and provide a steady stream of water.

What is causing this? Bad pump?
- Mike

'05 Beaver Patriot Thunder 525, Vicksburg, CAT C13, Allison 4000MH, HydraLift
Orlando, FL

Stan Simpson

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Re: Water Pump surging
« Reply #1 on: January 13, 2020, 04:42:07 PM »
Perhaps a clogged inlet filter, but I bet you've already checked that.
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Mike Shumack

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Re: Water Pump surging
« Reply #2 on: January 13, 2020, 04:58:49 PM »
Nothing obvious with the filter. Maybe it's time for a pump rebuilding kit.
- Mike

'05 Beaver Patriot Thunder 525, Vicksburg, CAT C13, Allison 4000MH, HydraLift
Orlando, FL

Bryan Beamon

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Re: Water Pump surging
« Reply #3 on: January 13, 2020, 06:27:06 PM »
Mike, in our Shurflo model #4048 you can adjust the shut off pressure with a 5/ 64 Allen wrench by turning it clockwise which should stop the rapid recycling. The pressure switch is located on the front of the pump. Suggest very small increments to test.
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Fred Brooks

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Re: Water Pump surging
« Reply #4 on: January 13, 2020, 11:55:36 PM »
  Mike, from what you state, it sounds like the pump is catching up and building enough pressure to cycle off then back on which means the pump is meeting the demand. To prove  this open 2 or 3 fixtures at the same time and see if the pump keeps up. You may want to check all the aerators  for possible restrictions. Hope this helps, Fred
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